I've been going through coils for my Aerotank very quickly, and after looking on here I found out that I can use my mini PT coils in the Aerotank. Another trick I picked up is soaking old coils in vodka for a few hours, rinsing with water, then doing a dry burn. Excellent results from what I've vaped so far. Hopefully I can double the lifespan of some of these coils! So thanks folks! =)